Boeing Union Approves New Eight-Year Contract

Updated Jan. 4, 2014 3:07 a.m. ET

SEATTLE—Boeing Co.'s largest union voted to accept a new contract that will keep the aerospace giant heavily unionized for years to come and avoid a risky move to expand jetliner manufacturing further outside its base in Washington state.

The vote, finalized late Friday, ends months of bitter contention over the eight-year deal, which takes effect in 2016, and will provide the union a predictable slate of work in Puget Sound while...